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Hollow spherical nano manganese ferrite, and preparation method and application thereof

A nano-iron, spherical technology, applied in separation methods, chemical instruments and methods, iron compounds, etc., can solve the problems of high process conditions and complex processes, and achieve the effect of simple preparation method and low cost

Active Publication Date: 2014-01-01
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the MnFe prepared by the above-mentioned prior art 2 o 4 The process is complex and the process conditions for preparation are relatively high
However, the hollow spherical nano-MnFe was prepared by a simple method. 2 o 4 , and used in the research on visible light catalytic degradation of benzene pollution, which has not been reported yet

Method used

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  • Hollow spherical nano manganese ferrite, and preparation method and application thereof
  • Hollow spherical nano manganese ferrite, and preparation method and application thereof
  • Hollow spherical nano manganese ferrite, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031]Take 0.9892g MnCl 2 4H 2 O and 2.7020 g FeCl 3 ·6H 2 O powder was added to 80ml of ethylene glycol solution with a purity of 99%, and magnetically stirred at room temperature to form a transparent solution. Add 7.2g NaAc and 2.0g polyethylene glycol 20000 powder and continue stirring for 90min. The above solution was added into a polytetrafluoroethylene autoclave with a specification of 100ml, and solvothermally reacted at 200°C for 20h. The black substance generated by the solvothermal reaction was centrifuged, washed thoroughly with deionized water and absolute ethanol to remove impurity ions, then dried in an oven at 60°C for 6 hours, and finally placed in a muffle furnace at 2°C / min Heating rate, calcined at 650°C for 2h. The calcined product was evenly ground for 30 minutes with an agate mortar, and then a brown-black powder with a particle size of 20 nm could be obtained after grinding.

Embodiment 2

[0033] Get 0.02g of the product obtained in Example 1 and put it into an infrared reaction tank, inject a small amount of liquid benzene, and the initial concentration of benzene after volatilization is 200mg / m 3 about. After 30 minutes of dark state adsorption, turn on the xenon lamp, radiate visible light with a wavelength above 400nm to irradiate the reaction cell, and use in-situ infrared spectroscopy to detect the visible photocatalytic degradation of gas-phase benzene. After 6 hours, the degradation rate of benzene reached 55%.

Embodiment 3

[0035] Get 0.02g of the product obtained in Example 1 and put it into an infrared reaction tank, inject a small amount of liquid benzene, and the initial concentration of benzene after volatilization is 300mg / m 3 about. After 30 minutes of dark state adsorption, turn on the xenon lamp, radiate visible light with a wavelength above 400nm to irradiate the reaction cell, and use in-situ infrared spectroscopy to detect the visible photocatalytic degradation of gas-phase benzene. After 6 hours, the degradation rate of benzene reached 48%.

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Abstract

The invention discloses hollow spherical nano manganese ferrite, and a preparation method and application thereof. The preparation method of the hollow spherical nano manganese ferrite comprises the following steps: adding manganese salt and iron salt into an ethylene glycol solution, adding polyethylene glycol, and performing solvothermal reaction; and after performing the procedures such as separation, washing, calcining and the like, grinding. The preparation method is convenient and low in cost; and the prepared hollow spherical nano manganese ferrite has ideal hollow spherical microscopic appearance, visible light can be well utilized, and degradation activity on gas-phase benzene under catalytic action of visible light is high. Thus, the hollow spherical nano manganese ferrite has dual application prospects in the aspects of solar energy utilization and environmental pollution regulation.

Description

technical field [0001] The invention belongs to the field of inorganic nanometer materials, in particular to a hollow spherical nanometer manganese ferrite, its preparation method and its application. Background technique [0002] Benzene is a representative substance of volatile organic pollutants (VOCs) in the air. Due to its high toxicity, potential carcinogenicity and persistent existence, it has become one of the environmental pollution problems that people generally pay attention to and study. At present, the methods for removing benzene pollution mainly include adsorption, absorption technology, condensation, membrane technology, incineration technology, biodegradation technology, plasma technology and photocatalytic oxidation method, etc. The above methods have their own advantages and disadvantages, and photocatalytic oxidation technology is considered to be one of the most promising environmental treatment technologies. Due to TiO 2 Catalysts can only utilize the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00B01J23/889B01J35/08B01D53/86B01D53/72
Inventor 沈昱王连峰刘淑红
Owner DALIAN JIAOTONG UNIVERSITY
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